// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/browser/bookmarks/bookmark_model.h"

#include <set>
#include <string>

#include "base/base_paths.h"
#include "base/basictypes.h"
#include "base/command_line.h"
#include "base/compiler_specific.h"
#include "base/containers/hash_tables.h"
#include "base/path_service.h"
#include "base/strings/string16.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/time/time.h"
#include "chrome/browser/bookmarks/bookmark_model_factory.h"
#include "chrome/browser/bookmarks/bookmark_model_observer.h"
#include "chrome/browser/bookmarks/bookmark_test_helpers.h"
#include "chrome/browser/bookmarks/bookmark_utils.h"
#include "chrome/test/base/testing_profile.h"
#include "content/public/test/test_browser_thread_bundle.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/base/models/tree_node_iterator.h"
#include "ui/base/models/tree_node_model.h"
#include "url/gurl.h"

using base::Time;
using base::TimeDelta;

namespace {

// Test cases used to test the removal of extra whitespace when adding
// a new folder/bookmark or updating a title of a folder/bookmark.
static struct {
  const std::string input_title;
  const std::string expected_title;
} url_whitespace_test_cases[] = {
  {"foobar", "foobar"},
  // Newlines.
  {"foo\nbar", "foo bar"},
  {"foo\n\nbar", "foo bar"},
  {"foo\n\n\nbar", "foo bar"},
  {"foo\r\nbar", "foo bar"},
  {"foo\r\n\r\nbar", "foo bar"},
  {"\nfoo\nbar\n", "foo bar"},
  // Spaces.
  {"foo  bar", "foo bar"},
  {" foo bar ", "foo bar"},
  {"  foo  bar  ", "foo bar"},
  // Tabs.
  {"\tfoo\tbar\t", "foo bar"},
  {"\tfoo bar\t", "foo bar"},
  // Mixed cases.
  {"\tfoo\nbar\t", "foo bar"},
  {"\tfoo\r\nbar\t", "foo bar"},
  {"  foo\tbar\n", "foo bar"},
  {"\t foo \t  bar  \t", "foo bar"},
  {"\n foo\r\n\tbar\n \t", "foo bar"},
};

// Test cases used to test the removal of extra whitespace when adding
// a new folder/bookmark or updating a title of a folder/bookmark.
static struct {
  const std::string input_title;
  const std::string expected_title;
} title_whitespace_test_cases[] = {
  {"foobar", "foobar"},
  // Newlines.
  {"foo\nbar", "foo bar"},
  {"foo\n\nbar", "foo  bar"},
  {"foo\n\n\nbar", "foo   bar"},
  {"foo\r\nbar", "foo  bar"},
  {"foo\r\n\r\nbar", "foo    bar"},
  {"\nfoo\nbar\n", " foo bar "},
  // Spaces.
  {"foo  bar", "foo  bar"},
  {" foo bar ", " foo bar "},
  {"  foo  bar  ", "  foo  bar  "},
  // Tabs.
  {"\tfoo\tbar\t", " foo bar "},
  {"\tfoo bar\t", " foo bar "},
  // Mixed cases.
  {"\tfoo\nbar\t", " foo bar "},
  {"\tfoo\r\nbar\t", " foo  bar "},
  {"  foo\tbar\n", "  foo bar "},
  {"\t foo \t  bar  \t", "  foo    bar   "},
  {"\n foo\r\n\tbar\n \t", "  foo   bar   "},
};

// Helper to get a mutable bookmark node.
BookmarkNode* AsMutable(const BookmarkNode* node) {
  return const_cast<BookmarkNode*>(node);
}

void SwapDateAdded(BookmarkNode* n1, BookmarkNode* n2) {
  Time tmp = n1->date_added();
  n1->set_date_added(n2->date_added());
  n2->set_date_added(tmp);
}

class BookmarkModelTest : public testing::Test,
                          public BookmarkModelObserver {
 public:
  struct ObserverDetails {
    ObserverDetails() {
      Set(NULL, NULL, -1, -1);
    }

    void Set(const BookmarkNode* node1,
             const BookmarkNode* node2,
             int index1,
             int index2) {
      node1_ = node1;
      node2_ = node2;
      index1_ = index1;
      index2_ = index2;
    }

    void ExpectEquals(const BookmarkNode* node1,
                      const BookmarkNode* node2,
                      int index1,
                      int index2) {
      EXPECT_EQ(node1_, node1);
      EXPECT_EQ(node2_, node2);
      EXPECT_EQ(index1_, index1);
      EXPECT_EQ(index2_, index2);
    }

   private:
    const BookmarkNode* node1_;
    const BookmarkNode* node2_;
    int index1_;
    int index2_;
  };

  BookmarkModelTest()
    : model_(NULL) {
    model_.AddObserver(this);
    ClearCounts();
  }

  virtual void Loaded(BookmarkModel* model, bool ids_reassigned) OVERRIDE {
    // We never load from the db, so that this should never get invoked.
    NOTREACHED();
  }

  virtual void BookmarkNodeMoved(BookmarkModel* model,
                                 const BookmarkNode* old_parent,
                                 int old_index,
                                 const BookmarkNode* new_parent,
                                 int new_index) OVERRIDE {
    ++moved_count_;
    observer_details_.Set(old_parent, new_parent, old_index, new_index);
  }

  virtual void BookmarkNodeAdded(BookmarkModel* model,
                                 const BookmarkNode* parent,
                                 int index) OVERRIDE {
    ++added_count_;
    observer_details_.Set(parent, NULL, index, -1);
  }

  virtual void OnWillRemoveBookmarks(BookmarkModel* model,
                                     const BookmarkNode* parent,
                                     int old_index,
                                     const BookmarkNode* node) OVERRIDE {
    ++before_remove_count_;
  }

  virtual void BookmarkNodeRemoved(BookmarkModel* model,
                                   const BookmarkNode* parent,
                                   int old_index,
                                   const BookmarkNode* node) OVERRIDE {
    ++removed_count_;
    observer_details_.Set(parent, NULL, old_index, -1);
  }

  virtual void BookmarkNodeChanged(BookmarkModel* model,
                                   const BookmarkNode* node) OVERRIDE {
    ++changed_count_;
    observer_details_.Set(node, NULL, -1, -1);
  }

  virtual void OnWillChangeBookmarkNode(BookmarkModel* model,
                                        const BookmarkNode* node) OVERRIDE {
    ++before_change_count_;
  }

  virtual void BookmarkNodeChildrenReordered(
      BookmarkModel* model,
      const BookmarkNode* node) OVERRIDE {
    ++reordered_count_;
  }

  virtual void OnWillReorderBookmarkNode(BookmarkModel* model,
                                         const BookmarkNode* node) OVERRIDE {
    ++before_reorder_count_;
  }

  virtual void BookmarkNodeFaviconChanged(BookmarkModel* model,
                                          const BookmarkNode* node) OVERRIDE {
    // We never attempt to load favicons, so that this method never
    // gets invoked.
  }

  virtual void ExtensiveBookmarkChangesBeginning(
      BookmarkModel* model) OVERRIDE {
    ++extensive_changes_beginning_count_;
  }

  virtual void ExtensiveBookmarkChangesEnded(BookmarkModel* model) OVERRIDE {
    ++extensive_changes_ended_count_;
  }

  virtual void BookmarkAllNodesRemoved(BookmarkModel* model) OVERRIDE {
    ++all_bookmarks_removed_;
  }

  virtual void OnWillRemoveAllBookmarks(BookmarkModel* model) OVERRIDE {
    ++before_remove_all_count_;
  }

  void ClearCounts() {
    added_count_ = moved_count_ = removed_count_ = changed_count_ =
        reordered_count_ = extensive_changes_beginning_count_ =
        extensive_changes_ended_count_ = all_bookmarks_removed_ =
        before_remove_count_ = before_change_count_ = before_reorder_count_ =
        before_remove_all_count_ = 0;
  }

  void AssertObserverCount(int added_count,
                           int moved_count,
                           int removed_count,
                           int changed_count,
                           int reordered_count,
                           int before_remove_count,
                           int before_change_count,
                           int before_reorder_count,
                           int before_remove_all_count) {
    EXPECT_EQ(added_count_, added_count);
    EXPECT_EQ(moved_count_, moved_count);
    EXPECT_EQ(removed_count_, removed_count);
    EXPECT_EQ(changed_count_, changed_count);
    EXPECT_EQ(reordered_count_, reordered_count);
    EXPECT_EQ(before_remove_count_, before_remove_count);
    EXPECT_EQ(before_change_count_, before_change_count);
    EXPECT_EQ(before_reorder_count_, before_reorder_count);
    EXPECT_EQ(before_remove_all_count_, before_remove_all_count);
  }

  void AssertExtensiveChangesObserverCount(
      int extensive_changes_beginning_count,
      int extensive_changes_ended_count) {
    EXPECT_EQ(extensive_changes_beginning_count_,
              extensive_changes_beginning_count);
    EXPECT_EQ(extensive_changes_ended_count_, extensive_changes_ended_count);
  }

  int AllNodesRemovedObserverCount() const { return all_bookmarks_removed_; }

 protected:
  BookmarkModel model_;
  ObserverDetails observer_details_;

 private:
  int added_count_;
  int moved_count_;
  int removed_count_;
  int changed_count_;
  int reordered_count_;
  int extensive_changes_beginning_count_;
  int extensive_changes_ended_count_;
  int all_bookmarks_removed_;
  int before_remove_count_;
  int before_change_count_;
  int before_reorder_count_;
  int before_remove_all_count_;

  DISALLOW_COPY_AND_ASSIGN(BookmarkModelTest);
};

TEST_F(BookmarkModelTest, InitialState) {
  const BookmarkNode* bb_node = model_.bookmark_bar_node();
  ASSERT_TRUE(bb_node != NULL);
  EXPECT_EQ(0, bb_node->child_count());
  EXPECT_EQ(BookmarkNode::BOOKMARK_BAR, bb_node->type());

  const BookmarkNode* other_node = model_.other_node();
  ASSERT_TRUE(other_node != NULL);
  EXPECT_EQ(0, other_node->child_count());
  EXPECT_EQ(BookmarkNode::OTHER_NODE, other_node->type());

  const BookmarkNode* mobile_node = model_.mobile_node();
  ASSERT_TRUE(mobile_node != NULL);
  EXPECT_EQ(0, mobile_node->child_count());
  EXPECT_EQ(BookmarkNode::MOBILE, mobile_node->type());

  EXPECT_TRUE(bb_node->id() != other_node->id());
  EXPECT_TRUE(bb_node->id() != mobile_node->id());
  EXPECT_TRUE(other_node->id() != mobile_node->id());
}

TEST_F(BookmarkModelTest, AddURL) {
  const BookmarkNode* root = model_.bookmark_bar_node();
  const base::string16 title(ASCIIToUTF16("foo"));
  const GURL url("http://foo.com");

  const BookmarkNode* new_node = model_.AddURL(root, 0, title, url);
  AssertObserverCount(1, 0, 0, 0, 0, 0, 0, 0, 0);
  observer_details_.ExpectEquals(root, NULL, 0, -1);

  ASSERT_EQ(1, root->child_count());
  ASSERT_EQ(title, new_node->GetTitle());
  ASSERT_TRUE(url == new_node->url());
  ASSERT_EQ(BookmarkNode::URL, new_node->type());
  ASSERT_TRUE(new_node == model_.GetMostRecentlyAddedNodeForURL(url));

  EXPECT_TRUE(new_node->id() != root->id() &&
              new_node->id() != model_.other_node()->id() &&
              new_node->id() != model_.mobile_node()->id());
}

TEST_F(BookmarkModelTest, AddURLWithUnicodeTitle) {
  const BookmarkNode* root = model_.bookmark_bar_node();
  const base::string16 title(WideToUTF16(
      L"\u767e\u5ea6\u4e00\u4e0b\uff0c\u4f60\u5c31\u77e5\u9053"));
  const GURL url("https://www.baidu.com/");

  const BookmarkNode* new_node = model_.AddURL(root, 0, title, url);
  AssertObserverCount(1, 0, 0, 0, 0, 0, 0, 0, 0);
  observer_details_.ExpectEquals(root, NULL, 0, -1);

  ASSERT_EQ(1, root->child_count());
  ASSERT_EQ(title, new_node->GetTitle());
  ASSERT_TRUE(url == new_node->url());
  ASSERT_EQ(BookmarkNode::URL, new_node->type());
  ASSERT_TRUE(new_node == model_.GetMostRecentlyAddedNodeForURL(url));

  EXPECT_TRUE(new_node->id() != root->id() &&
              new_node->id() != model_.other_node()->id() &&
              new_node->id() != model_.mobile_node()->id());
}

TEST_F(BookmarkModelTest, AddURLWithWhitespaceTitle) {
  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(url_whitespace_test_cases); ++i) {
    const BookmarkNode* root = model_.bookmark_bar_node();
    const base::string16 title(
        ASCIIToUTF16(url_whitespace_test_cases[i].input_title));
    const GURL url("http://foo.com");

    const BookmarkNode* new_node = model_.AddURL(root, i, title, url);

    int size = i + 1;
    EXPECT_EQ(size, root->child_count());
    EXPECT_EQ(ASCIIToUTF16(url_whitespace_test_cases[i].expected_title),
              new_node->GetTitle());
    EXPECT_EQ(BookmarkNode::URL, new_node->type());
  }
}

TEST_F(BookmarkModelTest, AddURLToMobileBookmarks) {
  const BookmarkNode* root = model_.mobile_node();
  const base::string16 title(ASCIIToUTF16("foo"));
  const GURL url("http://foo.com");

  const BookmarkNode* new_node = model_.AddURL(root, 0, title, url);
  AssertObserverCount(1, 0, 0, 0, 0, 0, 0, 0, 0);
  observer_details_.ExpectEquals(root, NULL, 0, -1);

  ASSERT_EQ(1, root->child_count());
  ASSERT_EQ(title, new_node->GetTitle());
  ASSERT_TRUE(url == new_node->url());
  ASSERT_EQ(BookmarkNode::URL, new_node->type());
  ASSERT_TRUE(new_node == model_.GetMostRecentlyAddedNodeForURL(url));

  EXPECT_TRUE(new_node->id() != root->id() &&
              new_node->id() != model_.other_node()->id() &&
              new_node->id() != model_.mobile_node()->id());
}

TEST_F(BookmarkModelTest, AddFolder) {
  const BookmarkNode* root = model_.bookmark_bar_node();
  const base::string16 title(ASCIIToUTF16("foo"));

  const BookmarkNode* new_node = model_.AddFolder(root, 0, title);
  AssertObserverCount(1, 0, 0, 0, 0, 0, 0, 0, 0);
  observer_details_.ExpectEquals(root, NULL, 0, -1);

  ASSERT_EQ(1, root->child_count());
  ASSERT_EQ(title, new_node->GetTitle());
  ASSERT_EQ(BookmarkNode::FOLDER, new_node->type());

  EXPECT_TRUE(new_node->id() != root->id() &&
              new_node->id() != model_.other_node()->id() &&
              new_node->id() != model_.mobile_node()->id());

  // Add another folder, just to make sure folder_ids are incremented correctly.
  ClearCounts();
  model_.AddFolder(root, 0, title);
  AssertObserverCount(1, 0, 0, 0, 0, 0, 0, 0, 0);
  observer_details_.ExpectEquals(root, NULL, 0, -1);
}

TEST_F(BookmarkModelTest, AddFolderWithWhitespaceTitle) {
  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(title_whitespace_test_cases); ++i) {
    const BookmarkNode* root = model_.bookmark_bar_node();
    const base::string16 title(
        ASCIIToUTF16(title_whitespace_test_cases[i].input_title));

    const BookmarkNode* new_node = model_.AddFolder(root, i, title);

    int size = i + 1;
    EXPECT_EQ(size, root->child_count());
    EXPECT_EQ(ASCIIToUTF16(title_whitespace_test_cases[i].expected_title),
              new_node->GetTitle());
    EXPECT_EQ(BookmarkNode::FOLDER, new_node->type());
  }
}

TEST_F(BookmarkModelTest, RemoveURL) {
  const BookmarkNode* root = model_.bookmark_bar_node();
  const base::string16 title(ASCIIToUTF16("foo"));
  const GURL url("http://foo.com");
  model_.AddURL(root, 0, title, url);
  ClearCounts();

  model_.Remove(root, 0);
  ASSERT_EQ(0, root->child_count());
  AssertObserverCount(0, 0, 1, 0, 0, 1, 0, 0, 0);
  observer_details_.ExpectEquals(root, NULL, 0, -1);

  // Make sure there is no mapping for the URL.
  ASSERT_TRUE(model_.GetMostRecentlyAddedNodeForURL(url) == NULL);
}

TEST_F(BookmarkModelTest, RemoveFolder) {
  const BookmarkNode* root = model_.bookmark_bar_node();
  const BookmarkNode* folder = model_.AddFolder(root, 0, ASCIIToUTF16("foo"));

  ClearCounts();

  // Add a URL as a child.
  const base::string16 title(ASCIIToUTF16("foo"));
  const GURL url("http://foo.com");
  model_.AddURL(folder, 0, title, url);

  ClearCounts();

  // Now remove the folder.
  model_.Remove(root, 0);
  ASSERT_EQ(0, root->child_count());
  AssertObserverCount(0, 0, 1, 0, 0, 1, 0, 0, 0);
  observer_details_.ExpectEquals(root, NULL, 0, -1);

  // Make sure there is no mapping for the URL.
  ASSERT_TRUE(model_.GetMostRecentlyAddedNodeForURL(url) == NULL);
}

TEST_F(BookmarkModelTest, RemoveAll) {
  const BookmarkNode* bookmark_bar_node = model_.bookmark_bar_node();

  ClearCounts();

  // Add a url to bookmark bar.
  base::string16 title(ASCIIToUTF16("foo"));
  GURL url("http://foo.com");
  model_.AddURL(bookmark_bar_node, 0, title, url);

  // Add a folder with child URL.
  const BookmarkNode* folder = model_.AddFolder(bookmark_bar_node, 0, title);
  model_.AddURL(folder, 0, title, url);

  AssertObserverCount(3, 0, 0, 0, 0, 0, 0, 0, 0);
  ClearCounts();

  model_.RemoveAll();

  EXPECT_EQ(0, bookmark_bar_node->child_count());
  // No individual BookmarkNodeRemoved events are fired, so removed count
  // should be 0.
  AssertObserverCount(0, 0, 0, 0, 0, 0, 0, 0, 1);
  AssertExtensiveChangesObserverCount(1, 1);
  EXPECT_EQ(1, AllNodesRemovedObserverCount());
}

TEST_F(BookmarkModelTest, SetTitle) {
  const BookmarkNode* root = model_.bookmark_bar_node();
  base::string16 title(ASCIIToUTF16("foo"));
  const GURL url("http://foo.com");
  const BookmarkNode* node = model_.AddURL(root, 0, title, url);

  ClearCounts();

  title = ASCIIToUTF16("foo2");
  model_.SetTitle(node, title);
  AssertObserverCount(0, 0, 0, 1, 0, 0, 1, 0, 0);
  observer_details_.ExpectEquals(node, NULL, -1, -1);
  EXPECT_EQ(title, node->GetTitle());
}

TEST_F(BookmarkModelTest, SetTitleWithWhitespace) {
  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(title_whitespace_test_cases); ++i) {
    const BookmarkNode* root = model_.bookmark_bar_node();
    base::string16 title(ASCIIToUTF16("dummy"));
    const GURL url("http://foo.com");
    const BookmarkNode* node = model_.AddURL(root, 0, title, url);

    title = ASCIIToUTF16(title_whitespace_test_cases[i].input_title);
    model_.SetTitle(node, title);
    EXPECT_EQ(ASCIIToUTF16(title_whitespace_test_cases[i].expected_title),
              node->GetTitle());
  }
}

TEST_F(BookmarkModelTest, SetURL) {
  const BookmarkNode* root = model_.bookmark_bar_node();
  const base::string16 title(ASCIIToUTF16("foo"));
  GURL url("http://foo.com");
  const BookmarkNode* node = model_.AddURL(root, 0, title, url);

  ClearCounts();

  url = GURL("http://foo2.com");
  model_.SetURL(node, url);
  AssertObserverCount(0, 0, 0, 1, 0, 0, 1, 0, 0);
  observer_details_.ExpectEquals(node, NULL, -1, -1);
  EXPECT_EQ(url, node->url());
}

TEST_F(BookmarkModelTest, SetDateAdded) {
  const BookmarkNode* root = model_.bookmark_bar_node();
  const base::string16 title(ASCIIToUTF16("foo"));
  GURL url("http://foo.com");
  const BookmarkNode* node = model_.AddURL(root, 0, title, url);

  ClearCounts();

  base::Time new_time = base::Time::Now() + base::TimeDelta::FromMinutes(20);
  model_.SetDateAdded(node, new_time);
  AssertObserverCount(0, 0, 0, 0, 0, 0, 0, 0, 0);
  EXPECT_EQ(new_time, node->date_added());
  EXPECT_EQ(new_time, model_.bookmark_bar_node()->date_folder_modified());
}

TEST_F(BookmarkModelTest, Move) {
  const BookmarkNode* root = model_.bookmark_bar_node();
  const base::string16 title(ASCIIToUTF16("foo"));
  const GURL url("http://foo.com");
  const BookmarkNode* node = model_.AddURL(root, 0, title, url);
  const BookmarkNode* folder1 = model_.AddFolder(root, 0, ASCIIToUTF16("foo"));
  ClearCounts();

  model_.Move(node, folder1, 0);

  AssertObserverCount(0, 1, 0, 0, 0, 0, 0, 0, 0);
  observer_details_.ExpectEquals(root, folder1, 1, 0);
  EXPECT_TRUE(folder1 == node->parent());
  EXPECT_EQ(1, root->child_count());
  EXPECT_EQ(folder1, root->GetChild(0));
  EXPECT_EQ(1, folder1->child_count());
  EXPECT_EQ(node, folder1->GetChild(0));

  // And remove the folder.
  ClearCounts();
  model_.Remove(root, 0);
  AssertObserverCount(0, 0, 1, 0, 0, 1, 0, 0, 0);
  observer_details_.ExpectEquals(root, NULL, 0, -1);
  EXPECT_TRUE(model_.GetMostRecentlyAddedNodeForURL(url) == NULL);
  EXPECT_EQ(0, root->child_count());
}

TEST_F(BookmarkModelTest, NonMovingMoveCall) {
  const BookmarkNode* root = model_.bookmark_bar_node();
  const base::string16 title(ASCIIToUTF16("foo"));
  const GURL url("http://foo.com");
  const base::Time old_date(base::Time::Now() - base::TimeDelta::FromDays(1));

  const BookmarkNode* node = model_.AddURL(root, 0, title, url);
  model_.SetDateFolderModified(root, old_date);

  // Since |node| is already at the index 0 of |root|, this is no-op.
  model_.Move(node, root, 0);

  // Check that the modification date is kept untouched.
  EXPECT_EQ(old_date, root->date_folder_modified());
}

TEST_F(BookmarkModelTest, Copy) {
  const BookmarkNode* root = model_.bookmark_bar_node();
  static const std::string model_string("a 1:[ b c ] d 2:[ e f g ] h ");
  test::AddNodesFromModelString(&model_, root, model_string);

  // Validate initial model.
  std::string actual_model_string = test::ModelStringFromNode(root);
  EXPECT_EQ(model_string, actual_model_string);

  // Copy 'd' to be after '1:b': URL item from bar to folder.
  const BookmarkNode* node_to_copy = root->GetChild(2);
  const BookmarkNode* destination = root->GetChild(1);
  model_.Copy(node_to_copy, destination, 1);
  actual_model_string = test::ModelStringFromNode(root);
  EXPECT_EQ("a 1:[ b d c ] d 2:[ e f g ] h ", actual_model_string);

  // Copy '1:d' to be after 'a': URL item from folder to bar.
  const BookmarkNode* folder = root->GetChild(1);
  node_to_copy = folder->GetChild(1);
  model_.Copy(node_to_copy, root, 1);
  actual_model_string = test::ModelStringFromNode(root);
  EXPECT_EQ("a d 1:[ b d c ] d 2:[ e f g ] h ", actual_model_string);

  // Copy '1' to be after '2:e': Folder from bar to folder.
  node_to_copy = root->GetChild(2);
  destination = root->GetChild(4);
  model_.Copy(node_to_copy, destination, 1);
  actual_model_string = test::ModelStringFromNode(root);
  EXPECT_EQ("a d 1:[ b d c ] d 2:[ e 1:[ b d c ] f g ] h ",
            actual_model_string);

  // Copy '2:1' to be after '2:f': Folder within same folder.
  folder = root->GetChild(4);
  node_to_copy = folder->GetChild(1);
  model_.Copy(node_to_copy, folder, 3);
  actual_model_string = test::ModelStringFromNode(root);
  EXPECT_EQ("a d 1:[ b d c ] d 2:[ e 1:[ b d c ] f 1:[ b d c ] g ] h ",
            actual_model_string);

  // Copy first 'd' to be after 'h': URL item within the bar.
  node_to_copy = root->GetChild(1);
  model_.Copy(node_to_copy, root, 6);
  actual_model_string = test::ModelStringFromNode(root);
  EXPECT_EQ("a d 1:[ b d c ] d 2:[ e 1:[ b d c ] f 1:[ b d c ] g ] h d ",
            actual_model_string);

  // Copy '2' to be after 'a': Folder within the bar.
  node_to_copy = root->GetChild(4);
  model_.Copy(node_to_copy, root, 1);
  actual_model_string = test::ModelStringFromNode(root);
  EXPECT_EQ("a 2:[ e 1:[ b d c ] f 1:[ b d c ] g ] d 1:[ b d c ] "
            "d 2:[ e 1:[ b d c ] f 1:[ b d c ] g ] h d ",
            actual_model_string);
}

// Tests that adding a URL to a folder updates the last modified time.
TEST_F(BookmarkModelTest, ParentForNewNodes) {
  ASSERT_EQ(model_.bookmark_bar_node(), model_.GetParentForNewNodes());

  const base::string16 title(ASCIIToUTF16("foo"));
  const GURL url("http://foo.com");

  model_.AddURL(model_.other_node(), 0, title, url);
  ASSERT_EQ(model_.other_node(), model_.GetParentForNewNodes());
}

// Tests that adding a URL to a folder updates the last modified time.
TEST_F(BookmarkModelTest, ParentForNewMobileNodes) {
  ASSERT_EQ(model_.bookmark_bar_node(), model_.GetParentForNewNodes());

  const base::string16 title(ASCIIToUTF16("foo"));
  const GURL url("http://foo.com");

  model_.AddURL(model_.mobile_node(), 0, title, url);
  ASSERT_EQ(model_.mobile_node(), model_.GetParentForNewNodes());
}

// Make sure recently modified stays in sync when adding a URL.
TEST_F(BookmarkModelTest, MostRecentlyModifiedFolders) {
  // Add a folder.
  const BookmarkNode* folder = model_.AddFolder(model_.other_node(), 0,
                                                 ASCIIToUTF16("foo"));
  // Add a URL to it.
  model_.AddURL(folder, 0, ASCIIToUTF16("blah"), GURL("http://foo.com"));

  // Make sure folder is in the most recently modified.
  std::vector<const BookmarkNode*> most_recent_folders =
      bookmark_utils::GetMostRecentlyModifiedFolders(&model_, 1);
  ASSERT_EQ(1U, most_recent_folders.size());
  ASSERT_EQ(folder, most_recent_folders[0]);

  // Nuke the folder and do another fetch, making sure folder isn't in the
  // returned list.
  model_.Remove(folder->parent(), 0);
  most_recent_folders =
      bookmark_utils::GetMostRecentlyModifiedFolders(&model_, 1);
  ASSERT_EQ(1U, most_recent_folders.size());
  ASSERT_TRUE(most_recent_folders[0] != folder);
}

// Make sure MostRecentlyAddedEntries stays in sync.
TEST_F(BookmarkModelTest, MostRecentlyAddedEntries) {
  // Add a couple of nodes such that the following holds for the time of the
  // nodes: n1 > n2 > n3 > n4.
  Time base_time = Time::Now();
  BookmarkNode* n1 = AsMutable(model_.AddURL(model_.bookmark_bar_node(),
                                             0,
                                             ASCIIToUTF16("blah"),
                                             GURL("http://foo.com/0")));
  BookmarkNode* n2 = AsMutable(model_.AddURL(model_.bookmark_bar_node(),
                                             1,
                                             ASCIIToUTF16("blah"),
                                             GURL("http://foo.com/1")));
  BookmarkNode* n3 = AsMutable(model_.AddURL(model_.bookmark_bar_node(),
                                             2,
                                             ASCIIToUTF16("blah"),
                                             GURL("http://foo.com/2")));
  BookmarkNode* n4 = AsMutable(model_.AddURL(model_.bookmark_bar_node(),
                                             3,
                                             ASCIIToUTF16("blah"),
                                             GURL("http://foo.com/3")));
  n1->set_date_added(base_time + TimeDelta::FromDays(4));
  n2->set_date_added(base_time + TimeDelta::FromDays(3));
  n3->set_date_added(base_time + TimeDelta::FromDays(2));
  n4->set_date_added(base_time + TimeDelta::FromDays(1));

  // Make sure order is honored.
  std::vector<const BookmarkNode*> recently_added;
  bookmark_utils::GetMostRecentlyAddedEntries(&model_, 2, &recently_added);
  ASSERT_EQ(2U, recently_added.size());
  ASSERT_TRUE(n1 == recently_added[0]);
  ASSERT_TRUE(n2 == recently_added[1]);

  // swap 1 and 2, then check again.
  recently_added.clear();
  SwapDateAdded(n1, n2);
  bookmark_utils::GetMostRecentlyAddedEntries(&model_, 4, &recently_added);
  ASSERT_EQ(4U, recently_added.size());
  ASSERT_TRUE(n2 == recently_added[0]);
  ASSERT_TRUE(n1 == recently_added[1]);
  ASSERT_TRUE(n3 == recently_added[2]);
  ASSERT_TRUE(n4 == recently_added[3]);
}

// Makes sure GetMostRecentlyAddedNodeForURL stays in sync.
TEST_F(BookmarkModelTest, GetMostRecentlyAddedNodeForURL) {
  // Add a couple of nodes such that the following holds for the time of the
  // nodes: n1 > n2
  Time base_time = Time::Now();
  const GURL url("http://foo.com/0");
  BookmarkNode* n1 = AsMutable(model_.AddURL(
      model_.bookmark_bar_node(), 0, ASCIIToUTF16("blah"), url));
  BookmarkNode* n2 = AsMutable(model_.AddURL(
      model_.bookmark_bar_node(), 1, ASCIIToUTF16("blah"), url));
  n1->set_date_added(base_time + TimeDelta::FromDays(4));
  n2->set_date_added(base_time + TimeDelta::FromDays(3));

  // Make sure order is honored.
  ASSERT_EQ(n1, model_.GetMostRecentlyAddedNodeForURL(url));

  // swap 1 and 2, then check again.
  SwapDateAdded(n1, n2);
  ASSERT_EQ(n2, model_.GetMostRecentlyAddedNodeForURL(url));
}

// Makes sure GetBookmarks removes duplicates.
TEST_F(BookmarkModelTest, GetBookmarksWithDups) {
  const GURL url("http://foo.com/0");
  const base::string16 title(ASCIIToUTF16("blah"));
  model_.AddURL(model_.bookmark_bar_node(), 0, title, url);
  model_.AddURL(model_.bookmark_bar_node(), 1, title, url);

  std::vector<BookmarkService::URLAndTitle> bookmarks;
  model_.GetBookmarks(&bookmarks);
  ASSERT_EQ(1U, bookmarks.size());
  EXPECT_EQ(url, bookmarks[0].url);
  EXPECT_EQ(title, bookmarks[0].title);

  model_.AddURL(model_.bookmark_bar_node(), 2, ASCIIToUTF16("Title2"), url);
  // Only one returned, even titles are different.
  bookmarks.clear();
  model_.GetBookmarks(&bookmarks);
  EXPECT_EQ(1U, bookmarks.size());
}

TEST_F(BookmarkModelTest, HasBookmarks) {
  const GURL url("http://foo.com/");
  model_.AddURL(model_.bookmark_bar_node(), 0, ASCIIToUTF16("bar"), url);

  EXPECT_TRUE(model_.HasBookmarks());
}

// See comment in PopulateNodeFromString.
typedef ui::TreeNodeWithValue<BookmarkNode::Type> TestNode;

// Does the work of PopulateNodeFromString. index gives the index of the current
// element in description to process.
void PopulateNodeImpl(const std::vector<std::string>& description,
                      size_t* index,
                      TestNode* parent) {
  while (*index < description.size()) {
    const std::string& element = description[*index];
    (*index)++;
    if (element == "[") {
      // Create a new folder and recurse to add all the children.
      // Folders are given a unique named by way of an ever increasing integer
      // value. The folders need not have a name, but one is assigned to help
      // in debugging.
      static int next_folder_id = 1;
      TestNode* new_node =
          new TestNode(base::IntToString16(next_folder_id++),
                       BookmarkNode::FOLDER);
      parent->Add(new_node, parent->child_count());
      PopulateNodeImpl(description, index, new_node);
    } else if (element == "]") {
      // End the current folder.
      return;
    } else {
      // Add a new URL.

      // All tokens must be space separated. If there is a [ or ] in the name it
      // likely means a space was forgotten.
      DCHECK(element.find('[') == std::string::npos);
      DCHECK(element.find(']') == std::string::npos);
      parent->Add(new TestNode(UTF8ToUTF16(element), BookmarkNode::URL),
                  parent->child_count());
    }
  }
}

// Creates and adds nodes to parent based on description. description consists
// of the following tokens (all space separated):
//   [ : creates a new USER_FOLDER node. All elements following the [ until the
//       next balanced ] is encountered are added as children to the node.
//   ] : closes the last folder created by [ so that any further nodes are added
//       to the current folders parent.
//   text: creates a new URL node.
// For example, "a [b] c" creates the following nodes:
//   a 1 c
//     |
//     b
// In words: a node of type URL with the title a, followed by a folder node with
// the title 1 having the single child of type url with name b, followed by
// the url node with the title c.
//
// NOTE: each name must be unique, and folders are assigned a unique title by
// way of an increasing integer.
void PopulateNodeFromString(const std::string& description, TestNode* parent) {
  std::vector<std::string> elements;
  base::SplitStringAlongWhitespace(description, &elements);
  size_t index = 0;
  PopulateNodeImpl(elements, &index, parent);
}

// Populates the BookmarkNode with the children of parent.
void PopulateBookmarkNode(TestNode* parent,
                          BookmarkModel* model,
                          const BookmarkNode* bb_node) {
  for (int i = 0; i < parent->child_count(); ++i) {
    TestNode* child = parent->GetChild(i);
    if (child->value == BookmarkNode::FOLDER) {
      const BookmarkNode* new_bb_node =
          model->AddFolder(bb_node, i, child->GetTitle());
      PopulateBookmarkNode(child, model, new_bb_node);
    } else {
      model->AddURL(bb_node, i, child->GetTitle(),
          GURL("http://" + UTF16ToASCII(child->GetTitle())));
    }
  }
}

// Test class that creates a BookmarkModel with a real history backend.
class BookmarkModelTestWithProfile : public testing::Test {
 public:
  BookmarkModelTestWithProfile()
      : bb_model_(NULL) {}

  // testing::Test:
  virtual void TearDown() OVERRIDE {
    profile_.reset(NULL);
  }

 protected:
  // Verifies the contents of the bookmark bar node match the contents of the
  // TestNode.
  void VerifyModelMatchesNode(TestNode* expected, const BookmarkNode* actual) {
    ASSERT_EQ(expected->child_count(), actual->child_count());
    for (int i = 0; i < expected->child_count(); ++i) {
      TestNode* expected_child = expected->GetChild(i);
      const BookmarkNode* actual_child = actual->GetChild(i);
      ASSERT_EQ(expected_child->GetTitle(), actual_child->GetTitle());
      if (expected_child->value == BookmarkNode::FOLDER) {
        ASSERT_TRUE(actual_child->type() == BookmarkNode::FOLDER);
        // Recurse throught children.
        VerifyModelMatchesNode(expected_child, actual_child);
        if (HasFatalFailure())
          return;
      } else {
        // No need to check the URL, just the title is enough.
        ASSERT_TRUE(actual_child->is_url());
      }
    }
  }

  void VerifyNoDuplicateIDs(BookmarkModel* model) {
    ui::TreeNodeIterator<const BookmarkNode> it(model->root_node());
    base::hash_set<int64> ids;
    while (it.has_next())
      ASSERT_TRUE(ids.insert(it.Next()->id()).second);
  }

  void BlockTillBookmarkModelLoaded() {
    bb_model_ = BookmarkModelFactory::GetForProfile(profile_.get());
    test::WaitForBookmarkModelToLoad(bb_model_);
  }

  // The profile.
  scoped_ptr<TestingProfile> profile_;
  BookmarkModel* bb_model_;

 private:
  content::TestBrowserThreadBundle thread_bundle_;
};

// Creates a set of nodes in the bookmark bar model, then recreates the
// bookmark bar model which triggers loading from the db and checks the loaded
// structure to make sure it is what we first created.
TEST_F(BookmarkModelTestWithProfile, CreateAndRestore) {
  struct TestData {
    // Structure of the children of the bookmark bar model node.
    const std::string bbn_contents;
    // Structure of the children of the other node.
    const std::string other_contents;
    // Structure of the children of the synced node.
    const std::string mobile_contents;
  } data[] = {
    // See PopulateNodeFromString for a description of these strings.
    { "", "" },
    { "a", "b" },
    { "a [ b ]", "" },
    { "", "[ b ] a [ c [ d e [ f ] ] ]" },
    { "a [ b ]", "" },
    { "a b c [ d e [ f ] ]", "g h i [ j k [ l ] ]"},
  };
  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(data); ++i) {
    // Recreate the profile. We need to reset with NULL first so that the last
    // HistoryService releases the locks on the files it creates and we can
    // delete them.
    profile_.reset(NULL);
    profile_.reset(new TestingProfile());
    profile_->CreateBookmarkModel(true);
    ASSERT_TRUE(profile_->CreateHistoryService(true, false));
    BlockTillBookmarkModelLoaded();

    TestNode bbn;
    PopulateNodeFromString(data[i].bbn_contents, &bbn);
    PopulateBookmarkNode(&bbn, bb_model_, bb_model_->bookmark_bar_node());

    TestNode other;
    PopulateNodeFromString(data[i].other_contents, &other);
    PopulateBookmarkNode(&other, bb_model_, bb_model_->other_node());

    TestNode mobile;
    PopulateNodeFromString(data[i].mobile_contents, &mobile);
    PopulateBookmarkNode(&mobile, bb_model_, bb_model_->mobile_node());

    profile_->CreateBookmarkModel(false);
    BlockTillBookmarkModelLoaded();

    VerifyModelMatchesNode(&bbn, bb_model_->bookmark_bar_node());
    VerifyModelMatchesNode(&other, bb_model_->other_node());
    VerifyModelMatchesNode(&mobile, bb_model_->mobile_node());
    VerifyNoDuplicateIDs(bb_model_);
  }
}

TEST_F(BookmarkModelTest, Sort) {
  // Populate the bookmark bar node with nodes for 'B', 'a', 'd' and 'C'.
  // 'C' and 'a' are folders.
  TestNode bbn;
  PopulateNodeFromString("B [ a ] d [ a ]", &bbn);
  const BookmarkNode* parent = model_.bookmark_bar_node();
  PopulateBookmarkNode(&bbn, &model_, parent);

  BookmarkNode* child1 = AsMutable(parent->GetChild(1));
  child1->SetTitle(ASCIIToUTF16("a"));
  delete child1->Remove(child1->GetChild(0));
  BookmarkNode* child3 = AsMutable(parent->GetChild(3));
  child3->SetTitle(ASCIIToUTF16("C"));
  delete child3->Remove(child3->GetChild(0));

  ClearCounts();

  // Sort the children of the bookmark bar node.
  model_.SortChildren(parent);

  // Make sure we were notified.
  AssertObserverCount(0, 0, 0, 0, 1, 0, 0, 1, 0);

  // Make sure the order matches (remember, 'a' and 'C' are folders and
  // come first).
  EXPECT_EQ(parent->GetChild(0)->GetTitle(), ASCIIToUTF16("a"));
  EXPECT_EQ(parent->GetChild(1)->GetTitle(), ASCIIToUTF16("C"));
  EXPECT_EQ(parent->GetChild(2)->GetTitle(), ASCIIToUTF16("B"));
  EXPECT_EQ(parent->GetChild(3)->GetTitle(), ASCIIToUTF16("d"));
}

TEST_F(BookmarkModelTest, Reorder) {
  // Populate the bookmark bar node with nodes 'A', 'B', 'C' and 'D'.
  TestNode bbn;
  PopulateNodeFromString("A B C D", &bbn);
  BookmarkNode* parent = AsMutable(model_.bookmark_bar_node());
  PopulateBookmarkNode(&bbn, &model_, parent);

  ClearCounts();

  // Reorder bar node's bookmarks in reverse order.
  std::vector<const BookmarkNode*> new_order;
  new_order.push_back(parent->GetChild(3));
  new_order.push_back(parent->GetChild(2));
  new_order.push_back(parent->GetChild(1));
  new_order.push_back(parent->GetChild(0));
  model_.ReorderChildren(parent, new_order);

  // Make sure we were notified.
  AssertObserverCount(0, 0, 0, 0, 1, 0, 0, 1, 0);

  // Make sure the order matches is correct (it should be reversed).
  ASSERT_EQ(4, parent->child_count());
  EXPECT_EQ("D", UTF16ToASCII(parent->GetChild(0)->GetTitle()));
  EXPECT_EQ("C", UTF16ToASCII(parent->GetChild(1)->GetTitle()));
  EXPECT_EQ("B", UTF16ToASCII(parent->GetChild(2)->GetTitle()));
  EXPECT_EQ("A", UTF16ToASCII(parent->GetChild(3)->GetTitle()));
}

TEST_F(BookmarkModelTest, NodeVisibility) {
  EXPECT_TRUE(model_.bookmark_bar_node()->IsVisible());
  EXPECT_TRUE(model_.other_node()->IsVisible());
  // Mobile node invisible by default
  EXPECT_FALSE(model_.mobile_node()->IsVisible());

  // Change visibility of permanent nodes.
  model_.SetPermanentNodeVisible(BookmarkNode::BOOKMARK_BAR, false);
  EXPECT_FALSE(model_.bookmark_bar_node()->IsVisible());
  model_.SetPermanentNodeVisible(BookmarkNode::OTHER_NODE, false);
  EXPECT_FALSE(model_.other_node()->IsVisible());
  model_.SetPermanentNodeVisible(BookmarkNode::MOBILE, true);
  EXPECT_TRUE(model_.mobile_node()->IsVisible());

  // Arbitrary node should be visible
  TestNode bbn;
  PopulateNodeFromString("B", &bbn);
  const BookmarkNode* parent = model_.bookmark_bar_node();
  PopulateBookmarkNode(&bbn, &model_, parent);
  EXPECT_TRUE(parent->GetChild(0)->IsVisible());

  // Bookmark bar should be visible now that it has a child.
  EXPECT_TRUE(model_.bookmark_bar_node()->IsVisible());
}

TEST_F(BookmarkModelTest, MobileNodeVisibileWithChildren) {
  const BookmarkNode* root = model_.mobile_node();
  const base::string16 title(ASCIIToUTF16("foo"));
  const GURL url("http://foo.com");

  model_.AddURL(root, 0, title, url);
  EXPECT_TRUE(model_.mobile_node()->IsVisible());
}

TEST_F(BookmarkModelTest, ExtensiveChangesObserver) {
  AssertExtensiveChangesObserverCount(0, 0);
  EXPECT_FALSE(model_.IsDoingExtensiveChanges());
  model_.BeginExtensiveChanges();
  EXPECT_TRUE(model_.IsDoingExtensiveChanges());
  AssertExtensiveChangesObserverCount(1, 0);
  model_.EndExtensiveChanges();
  EXPECT_FALSE(model_.IsDoingExtensiveChanges());
  AssertExtensiveChangesObserverCount(1, 1);
}

TEST_F(BookmarkModelTest, MultipleExtensiveChangesObserver) {
  AssertExtensiveChangesObserverCount(0, 0);
  EXPECT_FALSE(model_.IsDoingExtensiveChanges());
  model_.BeginExtensiveChanges();
  EXPECT_TRUE(model_.IsDoingExtensiveChanges());
  AssertExtensiveChangesObserverCount(1, 0);
  model_.BeginExtensiveChanges();
  EXPECT_TRUE(model_.IsDoingExtensiveChanges());
  AssertExtensiveChangesObserverCount(1, 0);
  model_.EndExtensiveChanges();
  EXPECT_TRUE(model_.IsDoingExtensiveChanges());
  AssertExtensiveChangesObserverCount(1, 0);
  model_.EndExtensiveChanges();
  EXPECT_FALSE(model_.IsDoingExtensiveChanges());
  AssertExtensiveChangesObserverCount(1, 1);
}

TEST(BookmarkNodeTest, NodeMetaInfo) {
  GURL url;
  BookmarkNode node(url);
  EXPECT_FALSE(node.GetMetaInfoMap());

  EXPECT_TRUE(node.SetMetaInfo("key1", "value1"));
  std::string out_value;
  EXPECT_TRUE(node.GetMetaInfo("key1", &out_value));
  EXPECT_EQ("value1", out_value);
  EXPECT_FALSE(node.SetMetaInfo("key1", "value1"));

  EXPECT_FALSE(node.GetMetaInfo("key2.subkey1", &out_value));
  EXPECT_TRUE(node.SetMetaInfo("key2.subkey1", "value2"));
  EXPECT_TRUE(node.GetMetaInfo("key2.subkey1", &out_value));
  EXPECT_EQ("value2", out_value);

  EXPECT_FALSE(node.GetMetaInfo("key2.subkey2.leaf", &out_value));
  EXPECT_TRUE(node.SetMetaInfo("key2.subkey2.leaf", ""));
  EXPECT_TRUE(node.GetMetaInfo("key2.subkey2.leaf", &out_value));
  EXPECT_EQ("", out_value);

  EXPECT_TRUE(node.DeleteMetaInfo("key1"));
  EXPECT_TRUE(node.DeleteMetaInfo("key2.subkey1"));
  EXPECT_TRUE(node.DeleteMetaInfo("key2.subkey2.leaf"));
  EXPECT_FALSE(node.DeleteMetaInfo("key3"));
  EXPECT_FALSE(node.GetMetaInfo("key1", &out_value));
  EXPECT_FALSE(node.GetMetaInfo("key2.subkey1", &out_value));
  EXPECT_FALSE(node.GetMetaInfo("key2.subkey2", &out_value));
  EXPECT_FALSE(node.GetMetaInfo("key2.subkey2.leaf", &out_value));
  EXPECT_FALSE(node.GetMetaInfoMap());
}

}  // namespace